Search for CP violation in Λb0→pK− and Λb0→pπ− decays

• Published in: Physics letters. B 2018-12, Vol.787, p.124-133
• Main Authors: Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Alfonso Albero, A., Alkhazov, G., Alves, A.A., Andrews, J.E., Batozskaya, V., Bedeschi, F., Beiter, A., Bel, L.J., Blake, T., Borghi, S., Borisyak, M., Borsato, M., Boubdir, M., Bowcock, T.J.V., Buonaura, A., Cadeddu, S., Calvo Gomez, M., Cardini, A., Chatzikonstantinidis, G., Chrzaszcz, M., Chubykin, A., Clarke, P.E.L., Costa Sobral, C.M., Craik, D.C., D'Ambrosio, C., Davis, A., De Aguiar Francisco, O., De Cian, M., Dosil Suárez, A., Dreimanis, K., Dufour, L., Durham, J.M., Dzyuba, A., Ene, A., Federici, L., Fitzpatrick, C., Franco Lima, V., Galli, D., Gao, Y., Gersabeck, E., Gizdov, K., Graciani Diaz, R., Granado Cardoso, L.A., Greim, R., Grünberg, O., He, J., Humair, T., Ketel, T., Klimkovich, T., Kostiuk, I., Kress, F., Kucewicz, W., Lacarrere, D., Lancierini, D., Lucio Martinez, M., Luppi, E., Lyu, X., Maisuzenko, D., Marinangeli, M., Materok, M., Mauri, A., McNab, A., Mitzel, D.S., Molina Rodriguez, J., Morris, A.B., Neri, N., Neuner, M., Otalora Goicochea, J.M., Patel, M., Patrignani, C., Perazzini, S., Pietrzyk, B., Pinzino, J., Polukhina, N., Ratnikov, F., Rodrigues, A.B., Sanchez Gras, C., Schmelzer, T., Schneider, O., Seyfert, P., Siddi, B.G., Simi, G., Skwarnicki, T., Smith, I.T., Stahl, M., Stemmle, S., Stramaglia, M.E., Strokov, S., Syropoulos, V., Tellarini, G., Tisserand, V., Tou, D.Y., Vazquez Regueiro, P., Waldi, R., Ward, D.R., Weisser, C., Yuan, X.
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2018.10.039

A search for CP violation in Λb0→pK− and Λb0→pπ− decays is presented using a sample of pp collisions collected with the LHCb detector and corresponding to an integrated luminosity of 3.0fb−1. The CP -violating asymmetries are measured to be ACPpK−=−0.020±0.013±0.019 and ACPpπ−=−0.035±0.017±0.020, and their difference ACPpK−−ACPpπ−=0.014±0.022±0.010, where the first uncertainties are statistical and the second systematic. These are the most precise measurements of such asymmetries to date.